CVE-2026-5123: Osrg Gobgp

Low severity, CVSS 3.7. EPSS: 0.7% chance of exploitation in the next 30 days.

A weakness has been identified in osrg GoBGP up to 4.3.0. This impacts the function DecodeFromBytes of the file pkg/packet/bgp/bgp.go. Executing a manipulation of the argument data[1] can lead to off-by-one. The attack may be launched remotely. Attacks of this nature are highly complex. The exploitability is said to be difficult. This patch is called 67c059413470df64bc20801c46f64058e88f800f. A patch should be applied to remediate this issue.

Affected products

• Osrg Gobgp: before 4.4.0 (fixed in 4.4.0)

Published 2026-03-30. Last modified 2026-06-17.